0050156
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Complement C5, Concentration

C5
Example Reports
Abnormal
Normal

Ordering Recommendation

Follow-up test for complement activity screening when CH50 and AH50 are low or absent and high suspicion remains for complement deficiency.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Serum separator tube.

Specimen Preparation

Allow specimen to clot for one hour at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.3 mL)

Storage/Transport Temperature

CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Non-frozen specimens. Specimens exposed to repeated freeze/thaw cycles. Specimens left to clot at refrigerated temperature.

Remarks
Stability

After separation from cells: Ambient: 2 hours; Refrigerated: Unacceptable; Frozen: 2 weeks

Methodology

Quantitative Radial Immunodiffusion

Performed

Tue, Fri

Reported

3-8 days

Reference Interval

7-20 mg/dL

Interpretive Data



Compliance Category

FDA

Note

Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
04/03/2023
X
X
N/A

CPT Codes

86160

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Components

Component Test Code* Component Chart Name LOINC
0050156 Complement C5, Concentration 4505-4
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • C5
  • C5 Antigen
  • C5 Level
  • complement terminal pathway
  • Fifth component of complement
  • Terminal Pathway - Complement
Complement C5, Concentration